<!DOCTYPE html>
<html>
  <head>
    <title>玫瑰</title>
    <meta charset="utf-8" />
  </head>

  <body>
    <p style="text-align: center">
      <canvas id="c" height="500" width="500"></canvas>
      <script>
        var b = document.body;
        var c = document.getElementsByTagName("canvas")[0];
        var a = c.getContext("2d");
        document.body.clientWidth;
      </script>
      <script>
        // start of submission //
        with ((m = Math)) (C = cos), (S = sin), (P = pow), (R = random);
        c.width = c.height = f = 500;
        h = -250;
        function p(a, b, c) {
          if (c > 60)
            return [
              S(a * 7) * (13 + 5 / (0.2 + P(b * 4, 4))) - S(b) * 50,
              b * f + 50,
              625 + C(a * 7) * (13 + 5 / (0.2 + P(b * 4, 4))) + b * 400,
              a * 1 - b / 2,
              a,
            ];
          A = a * 2 - 1;
          B = b * 2 - 1;
          if (A * A + B * B < 1) {
            if (c > 37) {
              n = (j = c & 1) ? 6 : 4;
              o = 0.5 / (a + 0.01) + C(b * 125) * 3 - a * 300;
              w = b * h;
              return [
                o * C(n) + w * S(n) + j * 610 - 390,
                o * S(n) - w * C(n) + 550 - j * 350,
                1180 + C(B + A) * 99 - j * 300,
                0.4 -
                  a * 0.1 +
                  P(1 - B * B, -h * 6) * 0.15 -
                  a * b * 0.4 +
                  C(a + b) / 5 +
                  P(C((o * (a + 1) + (B > 0 ? w : -w)) / 25), 30) *
                    0.1 *
                    (1 - B * B),
                o / 1e3 + 0.7 - o * w * 3e-6,
              ];
            }
            if (c > 32) {
              c = c * 1.16 - 0.15;
              o = a * 45 - 20;
              w = b * b * h;
              z = o * S(c) + w * C(c) + 620;
              return [
                o * C(c) - w * S(c),
                28 + C(B * 0.5) * 99 - b * b * b * 60 - z / 2 - h,
                z,
                (b * b * 0.3 + P(1 - A * A, 7) * 0.15 + 0.3) * b,
                b * 0.7,
              ];
            }
            o = A * (2 - b) * (80 - c * 2);
            w =
              99 -
              C(A) * 120 -
              C(b) * (-h - c * 4.9) +
              C(P(1 - b, 7)) * 50 +
              c * 2;
            z = o * S(c) + w * C(c) + 700;
            return [
              o * C(c) - w * S(c),
              B * 99 - C(P(b, 7)) * 50 - c / 3 - z / 1.35 + 450,
              z,
              (1 - b / 1.2) * 0.9 + a * 0.1,
              P(1 - b, 20) / 4 + 0.05,
            ];
          }
        }
        setInterval(
          'for(i=0;i<1e4;i++)if(s=p(R(),R(),i%46/.74)){z=s[2];x=~~(s[0]*f/z-h);y=~~(s[1]*f/z-h);if(!m[q=y*f+x]|m[q]>z)m[q]=z,a.fillStyle="rgb("+~(s[3]*h)+","+~(s[4]*h)+","+~(s[3]*s[3]*-80)+")",a.fillRect(x,y,1,1)}',
          0
        );
        // end of submission //
      </script>
      <br />
    </p>
  </body>
</html>
